NHTSA ID Number: 10222830
Manufacturer Communication Number: 21-NA-283
Summary
This service bulletin provides a service procedure to correct a customer concern of a Service Front Suspension Lift System Message Displayed on Driver Information Center (DIC) with DTC C103C and/or C103E Symptom 64 Set.
Condition
Some customers may comment that they have seen a Service Front Lift System message displayed on the DIC.
Some customers may also comment on a pump noise.
Technicians may find one or more of the following DTCs set:
- C103C: Left Front Strut Position Sensor Signal
- C103E: Left Front Strut Position Sensor Signal
Symptom 64: Signal Plausibility Failure (This sub type is used for failures where the control module detects a single input parameter is operating outside the plausible range.)
Cause
Note: If there is low mileage on the vehicle or previous service work on this system has been identified, it is possible that air entrapment in the system may be causing this issue.
This condition may be caused by air entrapment in the lift system.
Correction
Attempt to operate the front lift system several times. Determine if the codes will reset or if the system will raise briefly and then sink back down. If this occurs, that may indicate that there is indeed air trapped within the front suspension lift system.
Follow the published information in SI for these DTCs, paying particularly close attention to “Test B” at the end of the flowchart:
Note: For Prime and Bleed procedures to operate correctly, system related DTCs, specifically C103C and C103E, must be moved to HISTORY.*
⇒ First perform the Prime Front Suspension Pump procedure with the scan tool two times in an attempt to purge any trapped air bubbles from the system.
⇒ Next, raise and lower the front suspension system through 5 complete cycles.
If the DTCs reset, perform the Front Hydraulic Suspension Bleed procedure within Service Information and perform an Automatic Level Control System Bleed.
Re-evaluate the concern.
The Automatic Level Control System Bleed procedure may be performed up to three times, as necessary.
As a way to double check the system, a technician can measure the distance between the floor and the lower portion of the vehicle’s front fascia.
A correctly operating vehicle should reach a front fascia height of at least 35 mm within 4 seconds of pump operation.
4 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
CHEVROLET | CORVETTE | 2020-2023 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-283
Date: October, 2022
MC-10222830-0001.pdf 506.095KB
NHTSA ID Number: 10219292
Manufacturer Communication Number: 21-NA-283
Summary
This service bulletin provides a service procedure to correct a customer concern of a Service Front Suspension Lift System Message Displayed on Driver Information Center (DIC) with DTC C103C and/or C103E Symptom 64 Set.
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-283
Date: August, 2022
MC-10219292-0001.pdf 503.962KB
NHTSA ID Number: 10204443
Manufacturer Communication Number: PIC6434A
Summary
This Preliminary Information communicates diagnostic tips for a technician to diagnose a C103C / C103E set in the K218 Front Suspension Lift System.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIC6434A
Published date: 11/8/2021
- YEARS: 1963-1982
- MODELS: Compatible with Chevrolet
Corvette - HIGH-QUALITY: OEM Spec Replacements
- INCLUDED IN THE 22 PIECE KIT: Inner Tie Rods (2 Each), Outer Tie Rods (2 Each), Tie Rod Sleeves (2 Each), Sway Bar Links (2 Each), Sway Bar Bushings (2 Each) - 17.5 mm (0.68 Inch), Upper Control Arm Bushings (4 Each), Lower Control Arm Bushings (4 Each), Upper Ball Joints (2 Each), Lower Ball Joints (2 Each)
- ALSO CONTAINS: The Cotter Pins, Rubber Grease Seals/boots, Zerk Fittings (When Applicable), And The Bolts For The Ball Joints, Plus The Tie Rod Sleeve Bolts, Nuts, And Clamps.
- 1968-1974 MODELS: This Complete Front End Rebuild kit is compatible with 1968, 1968, 1970, 1971, 1972, 1973, 1974 Chevrolet Corvette; Each kit includes all you need plus cotter pins, rubber grease seals/boots, zerk fittings (when applicable), and bolts for the ball joints, tie rod sleeve bolts, nuts and clamps
- INCLUDED COMPONENTS: Inner Tie Rod Ends, Right and Left, Outer Tie Rod Ends, Right and Left, Tie Rod Sleeves (2 Each), Strut Rod Bushings (4 Each), Upper Ball Joints (2 Each), Lower Ball Joints (2 Each), Upper Control Arm Bushings (4 Each), Lower Control Arm Bushings (2 Each), Upper Control Arm Bumpers (2 Each), Lower Control Arm Bumpers (2 Each), Idler Arm
- ENHANCED HANDLING AND CONTROL: By replacing worn-out or damaged components with this comprehensive rebuild kit, you'll enjoy improved handling and control over your vehicle; Experience a revitalized front suspension system that enhances the overall driving experience
- FACTORY DESIGN STOCH VEHICLES: Designed specifically for stock vehicles, this kit consists of factory-designed parts that seamlessly integrate with 1968-1974 Chevrolet Corvette; Experience a smooth and reliable front suspension system that maintains the original design and performance
- HIGH-QUALITY OEM REPLACEMENT KIT : Ensure a precise fit and match the original equipment installed by the manufacturer, providing reliable fit and optimal performance, maintaining the integrity of your vehicle's front end suspension system
- COMPATIBILITY – Fits 1963-1982 Chevrolet Corvette
- GET THE RIGHT PART -- Before purchasing, please check the “Amazon Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “Amazon Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase
- MAINTAIN RIDE HEIGHT UNDER LOAD -- Air chamber can be inflated or deflated up to 150 PSI to maintain level height with additional weight up to 1,200 lbs. (capacity is limited by suspension, tires and transmission; see owner's manual)
- EASY TO ADJUST -- Special air fitting avoids air leakage and ties into factory system (where applicable) or manually inflates with an air compressor; pair with Monroe air shock accessory and shock air hose AK kits (varies by application)
- EXCEPTIONAL HANDLING -- Full-displaced valving on compression and extension cycles for a smooth ride
- YEARS: 1975-1982
- MODELS: Compatible with Chevrolet Corvette
- HIGH-QUALITY: OEM Spec Replacements
- INCLUDED IN THIS 22 PIECE KIT: Inner Tie Rods (2 Each), Outer Tie Rods (2 Each), Tie Rod Sleeves (2 Each), Sway Bar Links (2 Each), Sway Bar Bushings (2 Each), Upper Control Arm Bushings (4 Each), Lower Control Arm Bushings (4 Each), Upper Ball Joints (2 Each), Lower Ball Joints (2 Each)
- ALSO CONTAINS: the cotter pins, rubber grease seals/boots, zirc fittings (when applicable), and the bolts for the ball joints, plus the tie rod sleeve bolts, nuts, and clamps.
- COMPATIBILITY – Fits 2004-2005 Cadillac XLR; 2006-2009 Cadillac XLR; 2006-2008 Cadillac XLR; 2008-2009 Cadillac XLR; 1997-2004 Chevrolet Corvette; 2005-2013 Chevrolet Corvette; 2014-2022 Chevrolet Corvette; 2014-2019 Chevrolet Corvette
- GET THE RIGHT PART -- Before purchasing, please check the “Amazon Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “Amazon Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase
- Improves upon OE designs
- Quiet, dependable operation
- Provides like-new steering, ease of installation and longer life
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.
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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 21-NA-283 Date: October, 2022 TECHNICAL Subject: Service Front Suspension Lift System Message Displayed on Driver Information Center (DIC), Noise from Suspension Pump – DTC C103C and/or C103E Symptom 64 Set This bulletin replaces PIC6434A. Please discard PIC6434A. Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Chevrolet Corvette 2020 2023 All All All All Involved Region or Country North America, Europe, Middle East, Japan, Australia/New Zealand Additional Options (RPO) Front Suspension Lift System (RPO E60) Condition Some customers may comment that they have seen a Service Front Lift System message displayed on the DIC. Some customers may also comment on a pump noise. Technicians may find one or more of the following DTCs set: • C103C: Left Front Strut Position Sensor Signal • C103E: Left Front Strut Position Sensor Signal • Symptom 64: Signal Plausibility Failure (This sub type is used for failures where the control module detects a single input parameter is operating outside the plausible range.) Cause Note: If there is low mileage on the vehicle or previous service work on this system has been identified, it is possible that air entrapment in the system may be causing this issue. This condition may be caused by air entrapment in the lift system. Page 2 October, 2022 Bulletin No.: 21-NA-283 Correction Attempt to operate the front lift system several times. Determine if the codes will reset or if the system will raise briefly and then sink back down. If this occurs, that may indicate that there is indeed air trapped within the front suspension lift system. Follow the published information in SI for these DTCs, paying particularly close attention to “Test B” at the end of the flowchart: Note: For Prime and Bleed procedures to operate correctly, system related DTCs, specifically C103C and C103E, must be moved to HISTORY.* ⇒ First perform the Prime Front Suspension Pump procedure with the scan tool two times in an attempt to purge any trapped air bubbles from the system. ⇒ Next, raise and lower the front suspension system through 5 complete cycles. If the DTCs reset, perform the Front Hydraulic Suspension Bleed procedure within Service Information and perform an Automatic Level Control System Bleed. Re-evaluate the concern. The Automatic Level Control System Bleed procedure may be performed up to three times, as necessary. As a way to double check the system, a technician can measure the distance between the floor and the lower portion of the vehicle’s front fascia. A correctly operating vehicle should reach a front fascia height of at least 35 mm within 4 seconds of pump operation. Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must follow those applicable laws. Warranty Information For vehicles repaired under warranty, use: Labor Operation Description Labor Time 8020652 Front Hydraulic Suspension Bleeding Use Published Labor Operation Time Version 4 Modified Released December 06, 2021 Revised January 28, 2022 – Added Suspension Pump Noise to Subject and Condition section and added Additional SI Keywords. Revised August 24, 2022 – Added the 2023 Model Year. Revised September 28, 2022 – Updated Correction section information. Additional SI Keywords: loud, noisy, pump, assembly, PDI, rattle GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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